The historical works of Tacitus are a history of the period from A.D. 14 to 96 in thirty volumes. Although many of the works were lost (only books 1-5 of the Histories and 1-6 and 11-16 of the Annals survive), enough remains to provide a good sense of Tacitus's political and moral philosophy.

The Annals was Tacitus' final work, covering the period from the death of Augustus Caesar in the year 14. He wrote at least 16 books, but books 7-10 and parts of books 5, 6, 11 and 16 are missing. Book 6 ends with the death of Tiberius and books 7-12 presumably covered the reigns of Caligula and Claudius.